Recorder
This tool records that these files existed at these times. Your files are never uploaded: the fingerprint (SHA-256) is computed in your browser and only the fingerprint, the file name, the size and your note are written to a log stored on this device.
What it cannot prove. It cannot prove that no AI was used. Retyping generated text into a file produces the same kind of record. Times shown here come from your device's clock, and a device clock is not proof. The independent time anchor is the OpenTimestamps attestation (see "Stamp the log" below).
What is sent to our server. A random identifier kept in this browser, each page visit, one event each time you add a record, the link tag you arrived with (or whether you came from a search engine), an operator flag (false for you; it is true only on our own devices), which of our tools the event came from, the server time, and the country reported by our host. Never file names, hashes, notes or any content. Details: Privacy.
Your log lives only in this browser. Browsers can delete site data, for example after a period of not visiting the site. Export your log regularly and keep the exported file somewhere else.
Project
Add files
Drag files here, or
Log
| # | File | Size | SHA-256 | Note | Device time |
|---|
No records in this project yet.
Stamp the log
This page does not send anything to any timestamping service. You do that step yourself:
- Click "Export log". A JSON file is saved and its SHA-256 is shown below.
- Go to opentimestamps.org (or use the official OpenTimestamps client) and stamp that exported file yourself.
- You get back a file ending in .ots. Drag it onto the box below (choose the export it belongs to) so it is kept next to your log on this device.
- Keep the exported JSON file and its .ots file together. Anyone can check them with OpenTimestamps tools, without going through this site. Note: the official command-line client's own documentation says that verifying needs a local Bitcoin Core node. This page does not read or verify .ots files; it only stores them.
Drag the .ots file here, or
| Exported | Records | Log file SHA-256 | .ots |
|---|
General information, not legal advice. Everything is stored in this browser on this device; clearing site data deletes it, so export your log.